2 years ago

If (a+b)=4 and ab=3 find the value of a3 +b3

1 answer:

5 0

I think this might be the answer since (a+b) equals 4, and ab= 3. I'm not sure.
a3 + b3
= (4)3+4(3)
= 12+12
= 24

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iren [92.7K]

Remark

Many calculators have a key that will do this in one step. Mine is one of them. So let's start with the answer and then we'll do it the long way.

9C3 = 84. You put it into your calculator as 9 2nF nCr 3 =

Solution

$\dfrac{9!}{(n - 3)!3!} = \dfrac{9*8*7*6!}{6!*3!}=\dfrac{9*8*7}{6}$

3*4*7 = 84 which is what you set out to show.

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Aleksandr-060686 [28]

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Step-by-step explanation:

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mrs_skeptik [129]

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Natasha_Volkova [10]

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2 years ago

If (a+b)=4 and ab=3 find the value of a3 +b3​